95% U.S. Commercial Properties are less than 5,000 square meters. Vision/Problem Bringing custom energy control to small & medium commercial buildings

Transcription

1 IOT SENSOR INTEGRATION IN SMART BUILDINGS FOR MONITORING & CONTROL Invited Lecture Professor Saifur Rahman Director, Virginia Tech Advanced Research Inst., USA President, IEEE Power & Energy Society ENIT, Tunis, Tunisia, 04 September 2018 Vision/Problem Bringing custom energy control to small & medium commercial buildings 95% U.S. Commercial Properties are less than 5,000 square meters Current systems are too expensive, so energy is wasted 1

2 Virginia Tech Focus Develop an open source, low cost, low power consumption platform that can monitor and control majority of loads in buildings to improve energy efficiency and facilitate demand response implementation. Plug load 6% Others 26% Lighting load 38% HVAC 30% Electricity Usage in Buildings Three major loads in buildings: HVAC Lighting loads Plug loads Source: EIA - Commercial Building Energy Consumption Survey (CBECS) 3 An Open Architecture Platform for Building Energy Efficiency BEMOSS is a Building Energy Management Open Source Software (BEMOSS) solution that is engineered to improve sensing and control of all IoT-enabled equipment in commercial buildings BEMOSS monitoring and control: BEMOSS Three major loads in buildings Heating, Ventilation, AC Lighting loads Plug loads BEMOSS value: Improves energy efficiency and facilitates peak load savings in buildings buildings. 4 2

3 Services Provided by BEMOSS OpenADR signal BEMOSS accepts an OpenADR signal and performs control of HVAC, lighting and plug loads. Demand limit (kw) & time/duration BEMOSS OpenADR agent Pre-set knowledge of load priority and occupant preference HVAC agents Lighting load agent Plug load agent 5 Increase setpoint Reduce brightness Turn off selected plug loads Multiple-protocol Interoperability Communication Technologies q Ethernet (IEEE 802.3) q Serial Interface (RS-485) q ZigBee (IEEE ) q WiFi (IEEE ) RS-485 Data Exchange Protocols q BACnet (IP and MS/TP) q Modbus (RTU and TCP) q Web (e.g., XML, JSON, RSS/Atom) q ZigBee API WEB q Smart Energy Profile (SEP) q OpenADR (Open Automated Demand Response) Smart Energy Profile (SEP) 6 6 3

4 WiseBldg: Building Energy Management Platform Platform Architecture User Interface Layer Application Management Layer Data & Analytics Layer Device Connectivity Layer Web-based Control Device Scheduling Metadata DB (PostgreSQL) Smartphone App Control Device Control Time Series DB (Cassandra) Open ADR for Demand Response Machine Learning Algorithms API Translators for Energy and IOT Devices Thermostats Lighting Smart Plug Power meters Overview WiseBldg (pronounced Wise Building ) is BEM Controls powerful, low-cost, open-architecture software platform that can monitor and optimally control major electrical loads (e.g., HVAC, lighting and plug loads), as well as solar PV systems, energy storage units and other IoT sensors in commercial buildings. It is built on the DoE-sponsored BEMOSS platform developed at Virginia Tech. WiseBldg supports multiple IoT devices through industry standard protocols and communications technologies CT50 (WiFi ) CT80 (ZigBe e SE) ICM (WiFi) Nest (WiFi) HVAC Load Controllers CT30 (WiFi) VAV controller (Modbus) RTU (Modbus) Philips Hue (WiFi) Lighting load Light switch (WiFi) controller (BACnet) Lighting Load Controllers Step-dimmed ballast (ZigBee) Smart plug (WiFi) Sensors/ PowerMeters Power meter (Modbus) Power meter (BACnet/M odbus) Plug load controller (BACnet) Smart plug (ZigBee) Light sensor (BACnet) Occupancy sensor (BACnet) Plug Load Controllers 8 4

5 WiseBldg Platform Built by BEM Controls Occupant comfort Demand response Solar PV/Storage Management Energy Savings (kwh) Building Energy Management Peak demand (kw) reduction Alarm & Notifications Security Surveillance Utility/DR Aggregator Internet DR Event Pricing Billing HVAC Lighting loads Plug loads Encrypted Data Link Router Customers/Operators Buildings Sensors/power meters Water meters PV & storage Security camera 9 End-users, owners and vendors looking to control energy usage Facilities Managers Property Owners Energy Auditors Product Vendors 5

6 WiseBldg brings energy monitoring and control to small and medium-sized commercial buildings Current Market Practice Offerings are designed for large commercial buildings: Incumbents have focused on large buildings (>100K sq. feet), and the technology is not cost effective for small/medium-sized commercial building market. Closed Hardware + Software Solutions: Existing offerings require customers to acquire both hardware and software from the same vendor in order to control building systems. Existing Energy Management Systems cannot control devices from multiple vendors. WiseBldg Differentiators WiseBldg is made for small and medium commercial buildings: WiseBldg is an enterprise-grade monitoring and control software platform that serves this market whose applications can organically grow as requirements evolve over time. Open architecture allows WiseBldg to integrate multi-vendor hardware: WiseBldg leverages leading edge machine learning models for occupant comfort and energy savings, and has been tested for more than 25 different devices and protocols. Customers already controlling buildings optimized for savings Measured energy savings across deployments 20% HVAC Energy Savings 25% Lighting Energy Savings Improved operations and maintenance: WiseBldg analytical platform enables operators to detect faults when devices operate outside standard thresholds enabling building operators to investigate prior to equipment failures. Occupant satisfaction: spaces controlled by WiseBldg have been more comfortable due to more consistent temperature profiles and healthier air quality through consistent monitoring of environmental factors (CO2 levels, PM 2.5). 6

7 WiseBldg Deployments in Four Buildings 13 Building 1 Virginia Tech Architecture Building Location: Alexandria, VA Demonstration: HVAC, plug load control Building 2 Equipment Bureau Location: Arlington, VA Demonstration: Lighting control Building 3 Virginia Tech building Location: Blacksburg, VA Demonstration: HVAC control Building 4 PG County building Location: Camp Springs, MD Demonstration: HVAC control WiseBldg can make an old building smart 14 7

8 Building 1 VT Building in Alexandria, VA Alexandria, Virginia, USA Area: 2500 SqM Energy: MWh/mo. Peak load: 61 kw 15 Classroom under Real-time Monitoring Power meter Environmental sensor (CO2, noise, temperature) BEMOSS core Thermostat Motion sensor Plug load controller 16 8

9 9/5/18 Indoor Environmental Monitoring Weather Sensor Integration 17 Energy Savings from HVAC Control Location: Alexandria, VA Area: 2500 square meter Deployed Devices 6 Thermostats 6 Power meters 1 Li-ion battery 1 Environmental sensor Temperature profile BEFORE WiseBldg Demand Reduction Temperature profile AFTER WiseBldg Demand Reduction Using WiseBldg, Building Operator saved 27% on HVAC consumption alone Using WiseBldg the building operator reduced HVAC consumption by 27% Summer Months (June-July-August) Air Conditioner consumption 2014 (Before WiseBldg) 8,340 kwh Air Conditioner consumption 2016 (After WiseBldg) 6,071 kwh Average savings Base case (w/o WiseBldg) Setpoint: 74 deg F Energy usage = 2.72kWh Max demand = 3.98kW Managed by WiseBldg Setpoint: 79 deg F Energy usage = 1.42kWh Max demand = 0.5kW 26.8% savings 9

10 9/5/18 Office Building, Arlington, Virginia Office building floor size: 500 sqm 19 Energy Savings from Lighting Control Location: Arlington, VA Area: 500 sq meter Deployed Devices 3 Lighting controllers Using 1 PowerWiseBldg meter the building operator reduced HVAC consumption by 27% An average energy savings of 35% was achieved through dimming control Oct 2016 Nov 2016 Dec 2016 Jan 2017 Feb 2017 Mar 2017 Apr 2017 May 2017 Jun 2017 AVERAGE 33.7% 33.9% 34.4% 33.4% 35.9% 36.2% 35.0% 36.0% 36.3% 34.5% 10

11 9/5/18 Energy Management in a Museum Building 21 WiseBldg App 22 11

12 Solar PV System Monitoring and Control 23 WiseBldg User Interface Smart inverter control 24 12

13 Managing Battery Storage from WiseBldg Platform Battery Cells 5 kw 12 kwh Battery Storage Monitoring & Control 26 13

14 9/5/18 BEM Controls Website 27 Thank You Professor Saifur Rahman